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May 1, 1923, 1,43,3fi c. s. ID. PERRY BOILER SUPERHEATER Filed March 29 1921 2 Sheets-Sheet 1 O I 88888 8 OOQOOOO I HI 1 m up my w" w May 1, 1923.

I C.5.D.PEWRY BOILER SUPERHEATER Filed March 29, 1.921

IF I- 27 wqm 9 2 Sheets-Sheet 2 Kmwmmwmm 6.5.D/Pcrt9 Patented May 1,1923. l 1,453,633

UNITED STATES PATENT OFFICE.

OYRIL SAMUEL DRAYTON PERRY, OF PORT ARTHUR, ONTARIO, UAIN'AIDA.

BOILER SUPERHEATER.

Application filed March 29, 1921. Serial 1T0. 456,615.

To all whom it may concern: on, the customary smoke pipe being re- Be it known that I, CYRIL SAMUEL DRAY- moved.

TON PERRY, of the city of Port Arthur, in Fig. 2 is a vertical sectional View through the Province of Ontario, Canada, have inthe boiler, the section being taken at 2-2 5, vented certain new and useful Improve- Fi 1. 55 ments in Boiler Superheaters, of which the Fig. 3 is an enlarged vertical sectional following is the specification. view transversely through the upper part The invention relates to improvements in of the boiler and looking forwardly, the boiler superheaters and an object of the insection passing through the upper parts of vention is to provide a superheater par-, the combustion chambers to the rear of the 60 ticularly designed for use in a marine boiler headers. which will effectively superheat the satu- Fig. l is an enlarged detailed side view of rated steam of the boiler and deliver it to one of the headers. the engine supply pipe in a superheated Fig. 5 is an enlarged detailed end view state, thereby materially increasing the efof one of the headers. 65 ficiency of the boiler and engine. v Fig. 6 is a vertical sectional view through A further object of the invention is to one of the headers. construct the superheater so that it can be Fig. 7 is an enlarged detailed vertical readily applied to the existing type of masectional View through the distributing conrine boiler without requiring alterations in nection. 70 l the constructionof such boiler and to ar- Fig. 8 is an enlarged detailed vertical secrange the appliance so that it can be readily tional view through the joint connecting the installed in similar units corresponding-to superheater coil with the header. the number of furnaces in the boiler. In the drawings like characters of ref- A further object of the invention is to erence indicate corresponding parts in the 76 construct the headers of the superheating several figures. units such that they are interchangeable and I have shown the invention as installed such that the connections between headers on what is known as the cylindrical or can be readily made. Scotch boiler which is the type almost With the above more important and other exclusively adopted in merchant service. I 80 objects in view the invention consists essenhave not considered it necessary to give a .tially in a pair of headers located in each detailed description of such boiler as it is combustion chamber of the boiler, super well known. heating coils connecting the headers, a dis The said boiler consists of a cylindrical 35 tributing connection connected to the satshell 1 with which fiat ends 2 and 3 are urated steam pipe of the boiler, branch disstayed together by long tie rods 4. The tributing pipes leading from the connection furnaces vary in number and in the present through the boilerto a superheater in each instance I have shown three indicated at combustion chamber, a collecting connection 5, 6 and 7 and the furnaces are supplied 4 associated with the superheated steam pipe with the customary grates and pass from and collecting branch pipes passing through the front plate rearwardly to the combusthe boiler and connecting the latter contion chambers 9, 10 and 11. The combus nection with the other header of each furtion chambers are vertically disposed and nace, the parts being arranged and conare completely enclosed in the cylindrical 4,5 structed as hereinafter more particularly shell and are entirely surrounded by water. described and later pointed out in the ap- Smoke tubes 12 pass from each combustion pended claim, reference being bad to the chamber back to the front plate of the accompanying"drawingsin which boiler and through the water of the boiler Fig. 1 is a front end view of a marine and communicate with the smoke uptake 50 boiler showing my invention applied there (not shown) which leads to the funnel.

leads to the front end of the boiler where it is turned downwardly and is supplied with an outstanding coupling flange 14.

15 is a superheated steam pipe for supplying steam to the engine. This pipe also leads from the front end of the boiler and is supplied at the front end with a coupling flange 16. To the front end of the pipe 13 I connect a distributing connection 17 Which is provided with an outstanding flange similar to that 14 and is fastened to the pipe by bolting through the flanges. To the forward end of the pipe 15 I connect a collecting connection 18 which is pro-- vided with an outstanding flange 19 bolted to'the flange 16. The distributing and collecting connections communicate in each instance with the same number of branch pipes, the number of the branch pipes depending entirely on the number of the furnaces of the boiler. In the present instance I 'haveshown three furnaces so that there are three distributing branch pipes 20, 21 and 22 connected to the distributing connection 17 and three collecting branch pipes 23, 24 and 25 connected to the connection 18.

In the upper part of each combustion chamber of the boiler I locate a pair of headers 26 and 27, the headers'being connected by coils of pipe 28. The header 27, which is the receiving or lower header, is in a lower plane than that of header .26. The headers are all identically constructed, being substantially rectangular and box like and they are provided at their opposite sides with upper and lower rows of bosses 29 and 30, the bosses of the rows being staggered in position and are fitted at their forward ends with a boss 31 which is cored and screw threaded to receive the rear end of one of the branch pipes herein before mentioned. y

By providing both sides of the headers with bosses they can be used as desired, either right or left, as it is only necessary to core out and screw thread the bosses at one side or the other when the header is to be inserted. The headers are supported in the upper part of the combustion chamber by brackets 32 and 38 permanently fastened to the inner wall of the combustion chamber. The coils of pipe 28 which connect the headers of each combustion chamber are of a flattened S-shape and are arranged in upper and lower groups, there being a number of lower coils connecting the lowermost openings of the header 27 with the lowermost openings of the header 26 and a number of higher coils connecting the upper openings of the header 27 with the upper openings of the header '26. Here I wish it to be'understood that the openings of the headers to which I refer are the openings formed by coring and screw threading the bosses of the headers.

It is necessary to maintain a tight joint between the pipe coils and the headers and I have found it advisable to use ball jointed union joints with copper faces, the form of joint being best shown in Fig. 8 wherein it will be seen that the socket like member 34 receives the ball faced member 35, the members being held permanently seated by a jam nut 36. The details of the latter joint however are not essential as any joint which will withstand conditions can be used.

In Fig. 3 it will be seen that there is a pair of headers in each combustion chamber. The lower headers communicate with the branch pipes 20, 21 and 22 whilst the upper headers communicate with the branchpipes 23, 24 and 25. Accordingly, it will heap parent that the saturated steam coming from the boiler through the pipe 13 and entering the connection 17 is distributed through the distributing branch'pi tothe lower headers and passes from t e lower headers through the groups of coils to .the upper headers and from the upper headers is returned as superheated steam through the collecting branch pipes and collecting connections to the pipe 15, which is the service or supply pipe, to the engine.

The branch pipes in all instances pass through selected smoke tubes, being somewhat less in diameter than the smoketubes.

From the above it will be obvious that each combustion chamber contains what might be called a superheating unit embodying the headers and connecting coils and that these units are all identical. Accordingly it is a very easy matter to equip a boiler with my superheater as one simply provides a superheating unit for each oombustion chamber and then makes the connections through the branch pipes to the urated and superheating steam pipes. fie connections 17 and 18 would to uire-to be changed to accommodate the num er of furnaces of the boiler but otherwise the installation is not allectedby the number of imnaces.

Obviously the saturated steam admitted will be superheated in the coils by the intense heat developed in the combustion chambers and accordingly I not onlv eflect big saving of fuel but have high cie ney of power and practically no moisture at-the engine between pistons and cylinder, valves and chests, which is a difliculty now experienced.

What I claim as my invention is:

The combination with a boiler having a plurality of furnaces of a super-heater for each furnace comprising a pair of elongated hollow casings supported in the upper grt and on opposite sides of the furnace fire x,

one of said headers constituting the delivery header and being positioned somewhat higher than the other or receiving header, a plurality of rows of S-shaped super-heating coils connecting the headers of each pair, the coils of one row being located be tween the coils of the adjoining row, a saturated steam supply pipe, a plurality of distributing conduits extending between said 10 supply pipe and the receiving headers of the super-heaters, a superheated steam conduit, and a plurality of pipes extending be tween said last mentioned conduit and the delivery headers of the super-heaters.

Signed at Port Arthur, this 12th day of 15 February 1921.

CYRIL SAMUEL DRAYTON PERRY. In the presence 01 W. F. LANG-WORTHY, N. A. MOCALLUM. 

